The patterns, I think, would not be dissimilar between the three Kindreds of elves -- they all awoke under the stars, will all have some degree of reverence for them. The Teleri, I agree, will be more distinctive, with their sea-focus, but for all three I think the materials will be more varied then design.
Teler jewelry, I agree, should use pearls, and I
love the idea of whatever material they're using, thread or no, being woven to resemble rope.
I think a major difference between the Noldor and Vanyar could be the use of gold, which I think only Noldo jewelsmiths should use. That, and the abundance of gems. I would keep the Teler and Vanya styles with either thread (like ropes of pearls often have) or silver. Maybe copper? But I don't think so. I think the more fire/sun colored metals should "belong" to the Noldor.
I don't think the Vanyar never wear jewels (again, we keep comparing them to monks/montastics, but they're
not), but more like one large or several small gems in a silver necklace, not gems dripping from their necks. The difference between
and
perhaps?
I guess what I'm saying is that Vanya jewelry is a heckofalot more subtle than Noldo.
EDITED TO ADD: this is not meant to be a comment of taste, by the way. I want the Noldor to look gorgeous, not ridiculous. But like we said about Utumno, a very "highly done" type of gorgeous.